US7284469B2ExpiredUtilityA1

Protection from kinetic threats using glass-ceramic material

73
Assignee: GLASSCERAX LTDPriority: Jan 8, 2001Filed: Aug 30, 2004Granted: Oct 23, 2007
Est. expiryJan 8, 2021(expired)· nominal 20-yr term from priority
Inventors:Alexander RaichelAmir NachumiSvetlana Raichel
C04B 35/195C03C 1/02C03C 10/0036Y02P40/60F41H 5/0428C04B 35/22C03C 1/002B32B 17/067C04B 35/16F41H 5/0414C04B 33/1352
73
PatentIndex Score
20
Cited by
5
References
41
Claims

Abstract

A method for protecting an object from kinetic threats using a glass-ceramic is disclosed. The energy of impact is dissipated as a localized pulverization of the glass-ceramic without extensive shattering of the glass-ceramic. Further, a specific Anorthite glass-ceramic is provided and demonstrated to provide effective protection from multiple kinetic threats.

Claims

exact text as granted — not AI-modified
1. A method of protecting an object from kinetic threats comprising providing the object with armor including a glass-ceramic structure, said glass-ceramic structure comprising an Anorthite phase 
     wherein said glass-ceramic structure comprises at least one additional crystalline phase having a thermal coefficient of linear expansion between about 5×10 −7 ° C. −1  and about 250×10 −7 ° C. −1 . 
   
   
     2. The method of  claim 1 , wherein said glass-ceramic structure is part of a shielding device. 
   
   
     3. The method of  claim 1 , wherein said glass-ceramic structure comprises more than about 40% by weight Anorthite. 
   
   
     4. The method of  claim 1 , wherein said glass-ceramic structure comprises more than about 50% by weight Anorthite. 
   
   
     5. The method of  claim 1 , wherein said glass-ceramic structure comprises more than about 60% by weight Anorthite. 
   
   
     6. The method of  claim 1 , wherein said glass-ceramic structure comprises more than about 70% by weight Anorthite. 
   
   
     7. The method of  claim 1 , wherein said glass-ceramic structure comprises more than about 80% by weight Anorthite. 
   
   
     8. The method of  claim 1 , wherein said glass-ceramic structure comprises more than about 90% by weight Anorthite. 
   
   
     9. The method of  claim 1 , said glass-ceramic structure comprising CaO and Al 2 O 3 , the weight ratio of CaO to Al 2 O 3  being between about 1:1.3 and about 1:2.5. 
   
   
     10. The method of  claim 1 , said glass-ceramic structure comprising CaO and Al 2 O 3 , the weight ratio of CaO to Al 2 O 3  being between about 1:1.4 and about 1:2.3. 
   
   
     11. The method of  claim 1 , said glass-ceramic structure comprising CaO and Al 2 O 3 , the weight ratio of CaO to Al 2 O 3  being between about 1:1.6 and about 1:2.1. 
   
   
     12. The method of  claim 1 , said glass-ceramic structure comprising CaO and Al 2 O 3 , the weight ratio of CaO to Al 2 O 3  being between about 1:1.7 and about 1:1.95. 
   
   
     13. The method of  claim 1 , said glass-ceramic structure comprising CaO and Al 2   O   3 , the weight ratio of CaO to Al 2   3  being between about 1:1.75 and about 1:1.89. 
   
   
     14. The method of  claim 1 , said glass-ceramic structure comprising CaO and SiO 2 , the weight ratio of CaO to SiO 2  being between about 1:1.5 and about 1:3.0. 
   
   
     15. The method of  claim 1 , said glass-ceramic structure comprising CaO and SiO 2 , the weight ratio of CaO to SiO 2  being between about 1:1.6 and about 1:2.8. 
   
   
     16. The method of  claim 1 , said glass-ceramic structure comprising CaO and SiO 2 , the weight ratio of CaO to SiO 2  being between about 1:1.9 and about 1:2.4. 
   
   
     17. The method of  claim 1 , said glass-ceramic structure comprising CaO and SiO 2 , the weight ratio of CaO to SiO 2  being between about 1:2.0 and about 1:2.3. 
   
   
     18. The method of  claim 1 , said glass-ceramic structure comprising CaO and SiO 2 , the weight ratio of CaO to SiO 2  being between about 1:2.1 and about 1:2.2. 
   
   
     19. The method of  claim 1 , said glass-ceramic structure comprising more than about 5.0% by weight CaO. 
   
   
     20. The method of  claim 1 , said glass-ceramic structure comprising between about 15% and 23% by weight SiO 2 , between about 13% and 20% by weight Al 2 O 3  and between about 7% and 11% by weight CaO. 
   
   
     21. The method of  claim 1 , said glass-ceramic structure comprising between about 17% and 26% by weight SiO 2 , between about 15% and 22% by weight Al 2 O 3  and between about 8% and 12% by weight CaO. 
   
   
     22. The method of  claim 1 , said glass-ceramic structure comprising between about 19% and 28% by weight SiO 2 , between about 16% and 24% by weight Al 2 O 3  and between about 9% and 13% by weight CaO. 
   
   
     23. The method of  claim 1 , said glass-ceramic structure comprising between about 21% and 31% by weight SiO 2 , between about 18% and 27% by weight Al 2 O 3  and between about 10% and 14% by weight CaO. 
   
   
     24. The method of  claim 1 , said glass-ceramic structure comprising between about 22% and 34% by weight SiO 2 , between about 19% and 29% by weight Al 2 O 3  and between about 10% and 16% by weight CaO. 
   
   
     25. The method of  claim 1 , said glass-ceramic structure comprising between about 24% and 36% by weight SiO 2 , between about 21% and 31% by weight Al 2 O 3  and between about 11% and 17% by weight CaO. 
   
   
     26. The method of  claim 1 , said glass-ceramic structure comprising between about 26% and 39% by weight SiO 2 , between about 22% and 33% by weight Al 2 O 3  and between about 12% and 18% by weight CaO. 
   
   
     27. The method of  claim 1 , said glass-ceramic structure comprising between about 28% and 41% by weight SiO 2 , between about 24% and 36% by weight Al 2 O 3  and between about 13% and 19% by weight CaO. 
   
   
     28. The method of  claim 1 , said glass-ceramic structure comprising between about 29% and 44% by weight SiO 2 , between about 25% and 38% by weight Al 2 O 3  and between about 14% and 20% by weight CaO. 
   
   
     29. The method of  claim 1 , said glass-ceramic structure comprising between about 31% and 46% by weight SiO 2 , between about 26% and 40% by weight Al 2 O 3  and between about 14% and 22% by weight CaO. 
   
   
     30. The method of  claim 1 , wherein at least one said additional ciystalline phase has a thermal coefficient of linear expansion of between about 10×10 −7 ° C. −1  and 160×10 −7 ° C. −1 . 
   
   
     31. The method of  claim 1 , wherein at least one said additional crystalline phase has a thermal coefficient of linear expansion of between about 20×10 −7 ° C. −1  and 80×10 −7 ° C. −1 . 
   
   
     32. The method of  claim 1 , wherein at least one said additional crystalline phase is crystalline TiO 2 . 
   
   
     33. The method of  claim 32 , wherein said crystalline TiO 2  is Rutile. 
   
   
     34. The method of  claim 1 , wherein said glass-ceramic structure further comprises TiO 2 . 
   
   
     35. The method of  claim 34 ,. wherein said glass-ceramic structure comprises at least 0.3% by weight TiO 2 . 
   
   
     36. The method of  claim 34 , wherein said glass-ceramic structure comprises at least 1% by weight TiO 2 . 
   
   
     37. The method of  claim 34 , wherein said glass-ceramic structure comprises at least 2% by weight TiO 2 . 
   
   
     38. The method of  claim 34 , wherein said glass-ceramic structure comprises at least 4% by weight TiO 2 . 
   
   
     39. The method of  claim 34 , wherein said glass-ceramic structure comprises at least  6 % by weight TiO 2 . 
   
   
     40. The method of  claim 34 , wherein said glass-ceramic structure comprises between about 0.3% and 5% by weight TiO 2 . 
   
   
     41. The method of  claim 34 , wherein said glass-ceramic structure comprises between about 5% and 10% by weight TiO 2 .

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